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ArticleTowards transformation of agricultural landscapes: Determination of agroforestry tree species producing beneficial ecosystem services to local farmers in Nigeria
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.The aim of this study is to transform agricultural landscapes through incorporating tree species that produce ecosystem services beneficial to local farmers. To achieve this, the study assessed existing diversity of tree species producing ecosystem services in agricultural farmlands in selected local communities of southwest Nigeria. The information obtained will then be used to design strategy for intensification of agroforestry tree species for transformation of agricultural landscapes. Purposive sampling was employed in selecting 66 local farmers who has personal farmlands. Information on available tree species and their diversification on farmlands were obtained through inventory and field observation. Primary information obtained through questionnaire administration include ecosystem services provided by trees on the farmlands. A total of 38 forest tree species (24 families) were identified on the different farmlands. Provisioning services dominated the ecosystem services benefits obtained by the farmers and their households. The study has revealed the different ecosystem services provided by forest trees on farmlands. Meanwhile, most of the farmers prefer trees that meet their personal needs. This means for proper adoption of forest trees at local level in agroforestry system, such trees must be able to meet local demands by providing some of their basic needs. The basic needs range from food to medicines, energy, cultural benefits, among others. Meeting of such needs are sometimes location specifics, hence the needto carry out adequate survey of such needs for intended intervention strategy. Keywords: Agriculture, forest tree species, farmlands, provisioning services, ecosystem serviceId ID:3480958 -
ArticleVolume yield, tree species diversity and carbon storage of sacred groves in Southwestern Nigeria
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Recently, the role of sacred groves in biodiversity conservation and provision of ecosystem goods and services has been a subjected to scientific investigation. In this study, data were collected from four sacred groves (Osun‐Osogbo, Igbo‐Olodumare, Idanre Hills and Ogun‐Onire) in southwestern, Nigeria to investigate their volume yield, tree species diversity, biomass and carbon storage potentials. Data were collected from 32 sample plots of 20 m x 40 m, established across the four sacred groves. In each plot, all woody plants with dbh ≥10cm were identified and their growth variables (dbh and height) measured. Non‐destructive allometric equation method was adopted for the estimation of volume, biomass and carbon stock production. The number of families and tree species encountered in the groves (understory and overstory layers) ranged from 22 to 32 and 41 to 85, respectively. The four groves had high Shannon‐Wiener diversity index (2.63 ‐ 3.55). They had high volume yield (244.99 m3 ha‐1 to 343.08 m3 ha‐1), biomass production (87.8 t ha‐1 to 231.86 t ha‐1) and carbon stock (43.9 t ha‐1 to 115.9 t ha‐1), with potentials for continuous growth as evidenced by the presence of young trees in the lower canopy. Thus, besides being good biodiversity conservation method, sacred groves act as sink of atmospheric CO2 considering their high biomass and carbon accumulation. The use and protection of sacred groves by indigenous people has enhanced tree species diversity, improved carbon sequestration and production of other forests ecosystem goods and services, thereby mitigating climate change and its effects. Keywords: Biomass, Climate change, Carbon stock, Carbon sequestration, sacred forest and Traditional methods ID: 3605244 -
DocumentThe interaction between particulate matter (PM) adsorption and leaf gas exchange characteristics of urban trees exposed to fly ash
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Because of their vast surface distribution, external particle reactivity, and leaf characteristics, urban trees can contribute as biofilters, reducing PM pollution. Leaves of trees permit PM to be accumulated, depending on their leaf traits. The impacts of several leaf characteristics on PM accumulation capabilities, such as surface roughness and leaf morphology, have been studied. The change in relative humidity (RH) caused by leaf gas exchanges of urban trees also can be highly related to the removal efficiency of PM because the hygroscopic growth of particle is closely related to PM deposition. Nevertheless, the impacts of leaf gas exchange parameters including stomatal conductance and transpiration rate on PM deposition ability still remain unidentified. The effects of PM pollution on urban plants’ photosynthesis are also not well understood. In this study, we analyzed the correlation between PM accumulation and photosynthesis (Pn), stomatal conductance (gs) and transpiration (Tr) of all the tested urban trees under approximately 300 μg/m3 of fly ash emitted condition and evaluated the increased effect of leaf gas exchange parameters on PM deposition. We also studied whether the inhibiting impacts on the ability of leaf gas exchange is occurred by the blockage and closure of the stomata by using scanning electron microscopy (SEM). The purpose of our research was to better understand the interaction between particulate matter (PM) adsorption and leaf gas exchange characteristics of urban trees. Furthermore, the findings of this study can be used to provide scientific data about the suitability of tree species for urban forests. Keywords: Research, Climate change, Sustainable forest management ID: 3623026
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